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(No Model.)

JL J. FISHER 8v J. A. HERRNK.

MACHINE POR MAKING TUBES. No. 311,477. y Patented Feb. 3, 1885.

Il"llllumlllIlfllllll'lmlllll!! I @E g Lyman Il! E Twritten Srarns Partnr Orifice@ JOHN J. FISHER, OF CLEVELAND, OHIO, AND JAMES A. HERRIGK, OF NEW YORK, N. Y.; SAID FISHER ASSIGNOR OF ONE-THIRD IO SAID HERRICK.

.illAOl-HNE FOR MAMAN@ TUBES.

ESPECIFICATIOII forming part of Letters Patent BT11311477, dated February 3, 1885.

Application tiled May 215, 1853. (No model.)

1"'0 all whom, t may concern,.-

Be it known that we, JOHN J. FISI-IER, a citizen of the United States, residing at Cleveland, in the county of Cuyahoga and State of Ohio, and Janus A. HERRICK, also a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented certain new and useful Im.- provements in Machines for Making rIubes, of which the following is a specification, reference being had therein to the accompanying drawings.

Our invention relates to improvements in machines for converting ingots ,of steel, iron, and other metals into tubes or into bars of different forms; and the objects of our improvements are, rst, to provide a machine having a series of positively-driven grooved rolls and another` series of rolls driven by the :zo movement of the tube or barin passing through the machine and, second, to provide certain novel construction and combination of the parts of which the machine is composed, as will be more fully explained hereinafter. Ve attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure l is a plan or top view showing a portion of the frame of the machine, the driving-pulleys, shaft, and gearing,a series of positively-driv en rolls placed horizontally,and another series arranged vertically and driven by the movement of the tube or bar in passing between them. Guides are also shown for directing the tube or bar to the different pairs ot' rolls. Fig. 2 is a central longitudinal section showing the frame-work of the machine, the different pairs of rolls in position, screws for adjusting the horizontal rolls, the position of the in- 4o termediate rolls, one of the guides in dotted lines, and a bar having upon it blocks or dies for forming a tube from a hollow ingot. Fig. 3 is an end view showing one pair of the positively driven rolls, the manner of gearing them, and the end of the frame, and Fig. 4 is a view showing a bar used in forming tubes from hollow ingots, having upon it a series of blocks or dies ot' varying sizes for gradually increasing the diameter of the tube.

Similar letters indicate similar parts throughout the several views.

It has been customary heretofore to form tubes of metal bypassing hollow ingots between positively-driven rolls arranged horizontally and vertically; but this method has been found objectionable on account of the large additional amount of machinery required for moving the vertical rolls and the large additional amount of friction caused thereby.

Our invention differs materially from those 6o now in use in that all of the mechanism required for driving the vertical rolls is dispensed with, they being driven by the movement of the tube or bar in passing between them, said movement being caused by the positively-driven horizontal rolls.

Another essential difference consists in making arrangements for withdrawing the tube from the bar or blocks which determine its interior diameter without removing it from 7o the machine. This is accomplished by reversing the movement of the rolls.

In constructing machines with our improvements embodied we provide a frame, A, ot the required dimensions and strength, it having upon the upper surface of its bed-plate upwardly-projecting arms for the reception of the boxes in which the journals ot' the horizontal rolls rotate. Upon the upper ends of these arms or housings caps A2 are bolted, 8o which have an internally-screw-threaded aperture, through which passes an adjustingscrew, A, for use in adjusting the distance between the positively-driven horizontal rolls, by which means the outer diameter of the tubes is determined.

For the purpose of giving motion to the horizontal rolls there is bolted to the bed of the machine, or to any other suitable supports, brackets B, having in them bearings for the 9o reception of a shaft, B, upon the outer end of which there is placed three pulleys,over which a belt from any prime mover passes, the central pulley being fast upon the shat't,while the two outer ones turn freely thereon, the object of this arrangement being to provide for changing the direction of the rotation of the positively-driven rolls, this object being effected by using a crossed belt upon one ot' the pulleys.

In constructing machines of this type we prefer to employ three pairs of the positively- IOO ' similar wheels, B5,

driven horizontal rolls, but more or less may be used, if found desirable, they being placed upon shafts B3, upon which are secured bevelwheels Bt, which mesh with and are driven by secured upon the drivingshaft B.

' The rolls above alluded to may be of any desired diameter, they having in their peripheries grooves which may all be of the same diameter, as shown in Figs. l and 2, or they may be of varying diameters, for the purpose of adapting them to receive a bar having upon it blocks or dies of increasing diameter, as shown in Fig. 4.

Between each pair of the positively-driven rolls, which are designated by the letters BG ,B2 there is placed a pair of vertically-ar ranged rolls B7, the object of which is to preserve the tubes or bars in their proper form and to aid in giving them the desired shape, for which purpose the shafts may be placed in adjustable bearings, so that they may be moved toward or from each other as the size of the tube is increased or diminished, they being caused to rotate by the moving bar or tube.

In the practical operation of the machine, when solid bars of metal are to be formed, the bloom, or one end thereof, is to be reduced to such proportions as to allow it to enter the space between the rolls, the grooves in the periphery of which are to be ot' such form as to give to the bar the required contour, when the machine is put in motion and the bloom is reduced to a bar and delivered at the opposite end of the machine.

When used for forming tubes, we employ proper hollow guides, G, C', C2, C3, and 0*, into which one end ot' a hollow bloom or ingot is p1aced,itirst being placed upon a rod on which there are fixed at proper intervals blocks or dies, D D D2 D3, which, when the object is to increase the internal diameter of the tube, are to be of varying sizes, as shown in Fig. 4, so that as the tube is driven forward each one will enlarge such diameter to a certain extent until the required size has been obtained.

When the object is to lengthen the tube without changing its interior diameter, the blocks or dies may all be of one size, asshown in Fig. l. In either case therod upon which the dies are placed is to be held iirmlyinflxed `jaws of any suitable form, and the bloom or tube is caused to move forward by being grasped between the positively-driven rolls, for which purpose they are caused to rotate in the direction required. v

Without some provision being made for removing the tube from the blocks or dies, great difficulty would occur in doing it, as it would have to be removed and placed in another machine adapted for that purpose.

It is apparent that the last-named operation may be reversed, and the bloom or ingot held in iiXed jaws, and the rod and its dies drawn through it, the rounding up and forming of the tubes being done by same dies afterward.

We prefer to make the blocks or dies above referred to of cast-iron, as it has been found that less friction and abrasion is caused by drawing steel and wrought-iron tubes when they are made of that substance than when they are made of wrought-iron or steel.

Having thus described our invention, what we claim, and desire to secure by Letters Patent, is-

The combination of the pulleys B2 B2 BZ, drivingshat'tB, the shafts B3, rolls B6 and B7, and a rod orshaft carrying upon it a series of blocksor dies for determining the interior diameter of the tube, the parts being arranged substantially as described, whereby the tube may be formed upon the blocks or dies and removed therefrom, as set forth.

In testimony whereofwe aftix our signatures in presence ot' two witnesses.

JOHN J. FISHER. JAMES HERRICK.

Witnesses:

GRosvENoR S. HUBBARD, ARTHUR DUDLEY VINToN. 

